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    • 26. 发明公开
    • Low dielectric constant fluorinated polymers and methods of fabrication thereof
    • 氟化聚合物具有低介电常数和它们的制备方法。
    • EP0594947A2
    • 1994-05-04
    • EP93110696.7
    • 1993-07-05
    • International Business Machines Corporation
    • Hougham, Gareth GeoffreyShaw, Jane MargaretViehbeck, Alfred
    • C08G73/10
    • C08G73/1039
    • Low dielectric constant, high molecular weight polymers, e.g. polyimides, polyamides, polyesters and polyurethanes, are described.The fluorine containing constituents are sterically disposed so that the dipole moment of the constituents tend to cancel out. Since fluorine containing diamines are generally nonreactive, to achieve a polyimide of high enough molecular weight to be practically useful, a method of fabrication of a high molecular weight polymer from monomers of low reactivity is provided. The monomers, such as a diamine and dianhydride are provided in a solution within which a low molecular weight polyamic acid is formed. The solution is dried. The polyamic acid used is cured to a low molecular weight polyimide. The polyimide is redisolved, redried and recured enough times to build up the molecular weight to a useful level. The method is applicable to fabricating other polymers of high molecular weight, such as polyamides, polyesters and polyurethanes.
    • 低介电常数,高的分子量的聚合物,E.G. 聚酰亚胺,聚酰胺,聚酯和聚氨酯,也作了含氟成分“是空间配置做了成分的偶极矩”往往抵消。 由于含氟二胺是基因反弹非反应性,以达到足够高的分子量的聚酰亚胺是有用的。实际上,提供了一种从低反应性的单体的高分子量聚合物的制造的方法。 单体:例如二胺和二酐在其内的低分子量的聚酰胺酸形成的溶液中提供。 将溶液干燥。 使用的聚酰胺酸固化以低分子量的聚酰亚胺。 所述聚酰亚胺再溶解,再干燥和recured足够的次数,以分子量建立到有用的水平。 该方法适用于制造高分子量,颜色的其他聚合物:如聚酰胺,聚酯和聚氨酯。